2 Mark German Reich with typography overprint \"Gdansk\", blackish blue, corner margin stripe of three from corner margin lower left with overprint HAN \"3374.20\" and plate number \"3\" as well counter sheet number \"83, impeccable mint never hinged, expertized Kniep BPP and photo expertize Tworek BPP (2023) : \"genuine and immaculate\", an actual desirable piece of this rare colour shade!